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Table 1 Selected characteristics of participants and non-participants

From: Polyunsaturated fatty acids and child neurodevelopment among a population exposed to DDT: a cohort study

Characteristics Participants (n) Non-participants (n)
Maternal
 Intellectual quotient mean ± SD 87.50 ± 12.24
(274)
91.24 ± 13.24*
(83)
Infant
 Breastfeeding (weeks) %   
  Never   7.25 7.95
   ≤ 12   23.91 36.36
   > 12   68.84
(276)
55.68*
(88)
Family
 HOMEa mean ± SD 30.37 ± 4.64
(264)
31.08 ± 4.63*
(71)
  1. aHOME Home Observation for Measurement of the Environment scale
  2. *P-value< 0.05